We have Keiser spin bikes at my now former gym. They're smooth for sure, but they're not as adjustable as other brands. I always felt too stretched out on it. Plus, they had built-in power meters on them. Now, I'm sure some really like this, but I found it both distracting and discouraging. There were always people in class yaking about how much power they could generate. It was hard to tune it out. I have a spin bike at home that's more along the line of a Johnny G spinner. I really like it.